CN112509890B - breaker - Google Patents
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- Publication number
- CN112509890B CN112509890B CN201910871609.9A CN201910871609A CN112509890B CN 112509890 B CN112509890 B CN 112509890B CN 201910871609 A CN201910871609 A CN 201910871609A CN 112509890 B CN112509890 B CN 112509890B
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- Prior art keywords
- contact
- auxiliary
- push rod
- rod
- elastic
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- 230000007246 mechanism Effects 0.000 claims abstract description 87
- 230000003068 static effect Effects 0.000 claims description 13
- 238000005381 potential energy Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 10
- 238000004146 energy storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
一种断路器，包括设置于壳体内的操作机构、主触头机构和辅触头机构，操作机构包括支架，所述支架上安装有开关杆和弹性扭转件，所述弹性扭转件的第一臂与支架连接，弹性扭转件的第二臂与开关杆连接，所述辅触头机构包括推杆和辅触头，所述推杆与弹性扭转件的第二臂接触，在操作机构驱动开关杆带动主触头机构动作时，推杆在弹性扭转件的驱动下带动辅触头动作。本发明的断路器的闭合与断开完全由弹性扭转件的位置变化控制，断开过程中不需要克服驱动弹簧的阻力，减轻了操作机构的负担。
A circuit breaker includes an operating mechanism, a main contact mechanism and an auxiliary contact mechanism arranged in a housing, the operating mechanism includes a bracket, a switch rod and an elastic torsion member are installed on the bracket, the first arm of the elastic torsion member is connected to the bracket, the second arm of the elastic torsion member is connected to the switch rod, the auxiliary contact mechanism includes a push rod and an auxiliary contact, the push rod is in contact with the second arm of the elastic torsion member, when the operating mechanism drives the switch rod to drive the main contact mechanism to move, the push rod drives the auxiliary contact to move under the drive of the elastic torsion member. The closing and opening of the circuit breaker of the present invention are completely controlled by the position change of the elastic torsion member, and there is no need to overcome the resistance of the driving spring during the opening process, which reduces the burden of the operating mechanism.
Description
Technical Field
The invention relates to a circuit protector, in particular to a circuit breaker.
Background
The auxiliary contact of the existing motor circuit breaker is usually driven by a push rod arranged below an operating mechanism, a push plate which is matched with the push rod is arranged above the push rod, and a driving spring for pushing the push plate is arranged below the push plate. When the motor breaker is closed, as shown in fig. 4, the driving force for closing the main contact and the auxiliary contact is provided by the driving spring, and the pushing plate drives the push rod to keep a horizontal state, and when the motor breaker is opened, as shown in fig. 5, the operating mechanism drives the switch rod to push the pushing plate downwards, and the push rod rotates downwards under the action of the pushing plate, so that the main contact and the auxiliary contact are opened. From the above, when the auxiliary contact of the existing motor circuit breaker is in the closed state to the open state, the operating mechanism needs to overcome the resistance of the driving spring, and the resistance of the driving spring is not beneficial to breaking of the circuit breaker, so that the burden of the operating mechanism is heavy.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a circuit breaker with simple structure and high reliability.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a circuit breaker, includes operating device, main contact mechanism and the auxiliary contact mechanism that sets up in the casing, operating device includes the support, install switch lever and elasticity on the support and twist reverse the piece, the first arm and the leg joint that the piece was twisted to elasticity, the second arm and the switch lever that the piece was twisted to elasticity are connected, the auxiliary contact mechanism includes push rod and auxiliary contact, the push rod contacts with the second arm that the piece was twisted to elasticity, when operating device drive switch lever drove main contact mechanism action, the push rod drove the auxiliary contact action under the drive of elasticity twist reverse the piece.
Preferably, the auxiliary contact mechanism further comprises an auxiliary breaking elastic piece for driving the push rod to move synchronously with the elastic torsion piece, one end of the auxiliary breaking elastic piece is connected with the middle part of the push rod, and the other end of the auxiliary breaking elastic piece is fixed in the shell.
Preferably, the auxiliary contact comprises an auxiliary fixed contact, an auxiliary moving contact and a first elastic piece, and the auxiliary moving contact is closed or opened with the auxiliary fixed contact under the action of the push rod and the first elastic piece.
Preferably, the auxiliary fixed contact comprises a fixed normally open contact and a normally closed contact which are oppositely arranged, a first contact and a second contact which are matched with the normally open contact and the normally closed contact are respectively arranged on two sides of the auxiliary moving contact, and the auxiliary moving contact moves between the normally open contact and the normally closed contact under the action of the push rod.
Preferably, the push rod is an L-shaped push rod, one end of the L-shaped push rod is connected with the auxiliary contact, and the other end of the L-shaped push rod is connected with the second arm of the elastic torsion piece.
Preferably, the middle part of the push rod is rotationally connected with the shell or the bracket, and two ends of the push rod are respectively connected with the second arm and the auxiliary contact of the elastic torsion part.
Preferably, the main contact mechanism comprises a main contact and a second elastic piece, the main contact comprises a main fixed contact fixed in the shell and a driving contact matched with the main fixed contact, one side of the driving contact is convexly provided with a pushing part for being pushed by the switch rod, and the other side of the driving contact is provided with the second elastic piece.
Preferably, the elastic torsion member is a torsion spring.
Preferably, the switch rod is a triangular switch rod, each corner of the triangular switch rod is used as a connecting end, the first connecting end of the triangular switch rod is in driving connection with the operating mechanism, the second connecting end of the triangular switch rod is used for being in pivoting connection with the support, the third connecting end of the triangular switch rod is connected with the second arm of the elastic torsion piece, and the end part of the third connecting end of the triangular switch rod is used for driving the main contact mechanism to be disconnected.
The operating mechanism further comprises a gear, a jump buckle and a lock catch which are arranged on the support, the gear is connected with the jump buckle through a first connecting rod, the jump buckle is connected with the lock catch in a hasp mode, the jump buckle is connected with the switch rod through a second connecting rod, the gear rotates towards a closing direction, the jump buckle is locked with the lock catch, under the action of the first connecting rod and the second connecting rod, the jump buckle drives the switch rod to rotate to a closing position to enable the main contact mechanism and the auxiliary contact mechanism to be closed, elastic potential energy is stored by the elastic torsion piece, the gear rotates towards a separating direction, the jump buckle is unlocked with the lock catch, and under the action of the first connecting rod and the second connecting rod, the elastic torsion piece drives the switch rod to rotate to a separating position to enable the main contact mechanism and the auxiliary contact mechanism to be disconnected.
The auxiliary contact mechanism of the circuit breaker is different from the existing motor circuit breaker in closing and opening principle, the auxiliary contact mechanism of the circuit breaker is driven to act by the push rod in the deformation energy storage process of the elastic torsion piece, the closing and opening of the auxiliary contact mechanism is completely controlled by the position change of the elastic torsion piece, the auxiliary contact mechanism is driven to act by the push rod, a driving spring in the prior art is not needed, the resistance of the driving spring is not needed to be overcome in the acting process, and the burden of an operating mechanism is reduced.
In addition, through adding an auxiliary breaking elastic piece, can drive push rod and elasticity torsion piece simultaneous movement, avoid the push rod to stay in the closed condition because of the influence of frictional force, also can increase the pressure to the switch lever simultaneously, help the whole breaking of circuit breaker.
Drawings
Fig. 1 is a schematic view of the circuit breaker of the present invention when closed;
fig. 2 is a schematic view of the structure of the circuit breaker of the present invention when opened;
fig. 3 is a schematic structural view of a switching lever of the circuit breaker of the present invention;
fig. 4 is a schematic view of a circuit breaker in the related art when closed;
Fig. 5 is a schematic diagram of a circuit breaker in the related art when opened.
Detailed Description
Embodiments of the circuit breaker of the present invention are further described below with reference to the examples given in connection with fig. 1 to 5. The circuit breaker of the present invention is not limited to the description of the following embodiments.
The utility model provides a circuit breaker, includes operating device, main contact mechanism and the auxiliary contact mechanism that sets up in the casing, operating device includes support 11, install switch lever 4 and elasticity on the support 11 and twist reverse piece 5, the first arm 51 that elasticity was twisted piece 5 is connected with support 11, and the second arm 52 that elasticity was twisted piece 5 is connected with switch lever 4, the auxiliary contact mechanism includes push rod 31 and auxiliary contact, push rod 31 and the contact of the second arm 52 that elasticity was twisted piece 5, when operating device drive switch lever 4 drove main contact mechanism action, push rod 31 drove the auxiliary contact action under the drive of elasticity was twisted piece 5.
The auxiliary contact mechanism of the circuit breaker is different from the existing motor circuit breaker in closing and opening principle, the auxiliary contact mechanism of the circuit breaker is driven to act by the push rod 31 in the deformation energy storage process of the elastic torsion piece 5, the closing and opening of the auxiliary contact mechanism is completely controlled by the position change of the elastic torsion piece 5, the auxiliary contact mechanism is driven to act by the push rod 31, a driving spring in the prior art is not needed, the resistance of the driving spring is not needed to be overcome in the acting process, and the burden of an operating mechanism is reduced.
As shown in fig. 1-2, a motor circuit breaker comprises an operating mechanism, a main contact mechanism and an auxiliary contact mechanism which are arranged in a shell, wherein the operating mechanism comprises a bracket 11, a switch rod 4 and an elastic torsion member 5 are arranged on the bracket 11, a first arm 51 of the elastic torsion member 5 is connected with the bracket 11, a second arm 52 of the elastic torsion member 5 is connected with the switch rod 4, the bracket 11 comprises two brackets 11 which are oppositely arranged, only one of the brackets 11 is shown in the figure, the two brackets 11 are connected through a shaft or a rivet, the switch rod 4 is pivoted on the shaft between the two brackets 11, the first arm 51 of the elastic torsion member 5 is arranged on the bracket 11 which is not shown in the figure, and it is understood that the first arm 51 of the elastic torsion member 5 can also be arranged on the bracket 11 which is shown in the figure. The auxiliary contact mechanism comprises a push rod 31 and an auxiliary contact, the push rod 31 is in contact with the second arm 52 of the elastic torsion member 5, when the operating mechanism drives the switch rod 4 to drive the main contact mechanism to act, the push rod 31 drives the auxiliary contact to act under the driving of the elastic torsion member 5, wherein the auxiliary contact is detachably connected with the circuit breaker shell, and when the auxiliary contact is not needed, the auxiliary contact can be detached. Typically, a plurality of main contact mechanisms are provided in a housing of the circuit breaker, and the auxiliary contacts have a housing, and are inserted into a side wall of the housing of the circuit breaker to be matched with a push rod 31 in the housing. The push rod 31 is arranged in the shell, and the auxiliary contact can be arranged outside the shell as an additional device and operated by the push rod 31, and can also be arranged in the shell and operated by the push rod 31.
In this embodiment, the movement of the push rod 31 is translational, when the operating mechanism drives the switch lever 4 to close the main contact mechanism, the second arm 52 of the elastic torsion member 5 is lifted upwards in the process of compressing and accumulating energy under the driving of the switch lever 4, the push rod 31 is lifted along with the lifting of the second arm 52 of the elastic torsion member 5, at this time, the push rod 31 drives the auxiliary contact to close, as shown in fig. 1, when the operating mechanism drives the switch lever 4 to open the main contact, the elastic torsion member 5 is rotated along with the switch lever 4, the second arm 52 of the elastic torsion member 5 is driven to move downwards in the process of releasing elastic potential energy, and the push rod 31 is driven to move downwards under the action of the elastic torsion member 5, thereby opening the auxiliary contact, as shown in fig. 2. It is of course also possible to provide that the main contact is closed by the switch lever 4 and the auxiliary contact is opened by the elastic torsion member 5 via the push rod 31, i.e. the push rod 31 is driven by the elastic torsion member 5 to move synchronously upwards or downwards, so that the main contact and the auxiliary contact can be respectively in a closed state and an open state, which is not shown in the drawings.
In order to further optimize the disconnection of the auxiliary contact mechanism, an auxiliary breaking elastic piece 6 is preferably arranged in the shell, the auxiliary breaking elastic piece 6 drives the push rod 31 and the elastic torsion piece 5 to synchronously move so as to synchronously break the main contact mechanism and the auxiliary contact mechanism, and specifically, one end of the auxiliary breaking elastic piece 6 is connected with the middle part of the push rod 31, and the other end of the auxiliary breaking elastic piece is fixed in the shell. In addition, through adding an auxiliary breaking elastic piece 6, the push rod 31 and the elastic torsion piece 5 can be driven to synchronously move, so that the push rod 31 is prevented from staying in a closed state due to the influence of friction, and meanwhile, the pressure on the switch rod 4 can be increased, and the integral breaking of the motor circuit breaker is facilitated.
The main contact mechanism comprises a main contact and a second elastic piece 23, and the switch rod 4 and the second elastic piece 23 respectively provide driving force and restoring force for the main contact. The main contact comprises a main fixed contact 21 fixed in the shell and a driving contact 22 matched with the main fixed contact 21. The auxiliary contact comprises an auxiliary fixed contact, an auxiliary moving contact 323 and a first elastic piece 33, wherein the auxiliary moving contact 323 is closed or opened with the auxiliary fixed contact under the action of the push rod 31 and the first elastic piece 33. The auxiliary contact and the main contact can be synchronously closed or opened, the auxiliary static contact and the main static contact 21 are related to the positions of the auxiliary static contact and the main static contact 21, the auxiliary static contact and the main static contact 21 are arranged on the same side, the auxiliary contact and the main contact are synchronously closed or synchronously opened, the auxiliary static contact and the main static contact 21 are arranged on different sides, and when the main contact is closed, the auxiliary contact is opened.
The auxiliary contacts comprise at least one group of auxiliary fixed contacts and auxiliary movable contacts 323 and a first elastic piece 33, and the auxiliary movable contacts 323 are closed or opened with the auxiliary fixed contacts under the action of the push rod 31 and the first elastic piece 33. The auxiliary fixed contact in this embodiment includes two sets of normally open contact 321 and normally closed contact 322 that set up relatively, the both sides of auxiliary moving contact 323 are equipped with respectively with normally open contact 321, normally closed contact 322 matched with first contact, second contact, auxiliary moving contact 323 moves between normally open contact 321, normally closed contact 322 under the effect of push rod 31, can be connected through the elastic component between first contact and the second contact. The push rod 31 drives the auxiliary moving contact 323 to move upwards to enable the first contact to be in contact with the normally-open contact 321 so as to achieve the closing of the normally-open contact of the auxiliary contact, one side provided with the second contact is connected with the first elastic piece 33, and the first elastic piece 33 provides downward driving force for the auxiliary moving contact 323 to drive the second contact to be in contact with the normally-closed contact 322 so as to achieve the opening of the normally-open contact of the auxiliary contact. The first elastic member 33 provides a restoring driving force for the auxiliary contact, when the push rod 31 makes the auxiliary contact 323 move upwards to be closed under the action of the elastic torsion member 5, the resistance of the first elastic member 33 needs to be overcome, and when the push rod 31 makes the auxiliary contact 323 move downwards to be opened under the action of the elastic torsion member 5, the first elastic member 33 provides a downward restoring driving force for the auxiliary contact 323 to make the auxiliary contact 323 be opened in an accelerating way. The specific push rod 31 may be configured as an L-shaped push rod 31, but is not limited to an L-shape, one end of the L-shaped push rod 31 is connected with the auxiliary contact, the other end of the L-shaped push rod 31 is connected with the second arm 52 of the elastic torsion member 5, and a sliding rail for assisting the movement of the push rod 31 may be provided in the housing or the bracket 11, for example, the sliding rail is a guiding sliding groove provided in a vertical direction.
Specifically, as shown in fig. 1-2, the main contact mechanism includes a main contact and a second elastic member 23, where the second elastic member 23 provides an upward driving force for the main contact, so that the main contact is disconnected under the combined action of the second elastic member 23 and the switch lever 4. The main contact comprises a main fixed contact 21 fixed in the shell and a main contact 22 matched with the main fixed contact 21, a pushing part 221 used for being pushed by the switch rod 4 is arranged on one side, close to the main fixed contact 21, of the main contact 22 in a protruding mode, the pushing part 221 is set to reduce the moving distance of the switch rod 4 or shorten the size of the switch rod 4, in the embodiment, a second elastic piece 23 is arranged on one side, far away from the main fixed contact 21, of the main contact 22, the main fixed contact 21 is contacted and closed by elastic force of the second elastic piece 23, the operating mechanism drives the switch rod 4 to rotate and press the pushing part 221 of the main contact 22, and the main contact 22 is separated and disconnected from the main fixed contact 21 by overcoming elastic force of the second elastic piece 23.
As another embodiment, the middle part of the push rod 31 is rotatably connected with the housing or the bracket 11, and two ends of the push rod 31 are respectively hinged with the second arm 52 and the auxiliary contact of the elastic torsion member 5. By utilizing the lever principle, when the elastic torsion piece 5 drives one end of the push rod 31 to rise, the other end of the push rod 31 descends and acts on the auxiliary contact to open or close. In addition, the auxiliary contact mechanism can also comprise other transmission or connecting rod structures matched with the push rod 31 to drive the auxiliary contact to act.
Both embodiments can use a switch lever 4 structure as shown in fig. 3, the switch lever 4 is preferably configured as a substantially triangular switch lever 4, although other shapes are possible, and three separate connection ends are still required, wherein each corner of a specific triangular switch lever 4 is used as one connection end, a first connection end 41 of the triangular switch lever 4 is in driving connection with the operating mechanism, a second connection end 42 of the triangular switch lever 4 is used for being pivotally connected with the bracket 11, a third connection end 43 of the triangular switch lever 4 is connected with a second arm 52 of the elastic torsion member 5, and an end of the third connection end 43 of the triangular switch lever 4 is used for driving the main contact mechanism to be disconnected, and is in contact with the pushing portion 221 of the active contact 22.
The operating mechanism specifically comprises a gear 12, a jump button 13 and a lock catch 14 which are arranged on a support 11, wherein the gear 12 is arranged on the upper portion of the support 11, the jump button 13 and the lock catch 14 are arranged on one side of the gear 12, the gear 12 is connected with the jump button 13 through a first connecting rod 15, the jump button 13 is in snap connection with the lock catch 14 and rotatably arranged on the support 11, the jump button 13 is connected with a switch rod 4 through a second connecting rod 16, the gear 12 rotates towards a closing direction, the jump button 13 is locked with the lock catch 14, under the action of the first connecting rod 15 and the second connecting rod 16, the jump button 13 drives the switch rod 4 arranged on the lower portion of the support 11 to rotate to a closing position, the elastic torsion member 5 stores elastic potential energy, the end part of a third connecting end 43 of the switch rod 4 is lifted and separated from a main contact mechanism, in the process, a push rod 31 is driven by the elastic torsion member 5 to operate an auxiliary contact mechanism, the gear 12 rotates towards a separating direction, the jump button 13 is unlocked with the lock catch 14, the action of the first connecting rod 15 and the second connecting rod 16 enables the elastic torsion member 5 to drive the switch rod 4 to rotate to the separating position, the third connecting rod 4 rotates to the corresponding end of the main contact mechanism 31 is driven by the auxiliary contact mechanism, and the elastic torsion member is driven by the corresponding push rod 5 to the trigger the auxiliary contact mechanism to the end 43 to move. Specifically, the gear 12 and the switch lever 4 are respectively disposed on the upper and lower sides of the bracket 11, the elastic torsion member 5 is disposed on one side of the gear 12 and the switch lever 4, and the trip button 13 and the latch 14 are disposed on the other side of the gear 12 and the switch lever 4.
The elastic torsion member 5 is a torsion spring, and the first elastic member 33, the second elastic member 23 and the auxiliary breaking elastic member 6 are compression springs.
Compared with the prior motor circuit breaker, the auxiliary contact mechanism is closed and opened by the elastic torsion piece 5 for storing elastic potential energy in the motor circuit breaker, the auxiliary contact mechanism is driven to be closed and opened by utilizing the position change of the elastic torsion piece 5 in the switching process of closing and opening, the function of the elastic torsion piece 5 is increased, the push plate a originally arranged in the shell and the driving spring b used for driving the main contact mechanism and the auxiliary contact mechanism under the push plate a are canceled, the rotation pushing of the original push rod 31' is changed into the vertical displacement driven by the torsion elastic piece 5, the resistance of the operating mechanism which needs to be overcome in the closing and opening process is reduced, and the product optimization of the motor circuit breaker is facilitated.
The primary and secondary contact mechanisms in fig. 1-2 are each shown as one, but the specific number is not limited to one.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910871609.9A CN112509890B (en) | 2019-09-16 | 2019-09-16 | breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910871609.9A CN112509890B (en) | 2019-09-16 | 2019-09-16 | breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112509890A CN112509890A (en) | 2021-03-16 |
| CN112509890B true CN112509890B (en) | 2025-03-18 |
Family
ID=74923755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910871609.9A Active CN112509890B (en) | 2019-09-16 | 2019-09-16 | breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112509890B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210607152U (en) * | 2019-09-16 | 2020-05-22 | 浙江正泰电器股份有限公司 | breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6867670B2 (en) * | 2002-11-05 | 2005-03-15 | Eaton Corporation | Circuit breaker with auxiliary switches and mechanisms for operating same |
| DE102006051807B8 (en) * | 2006-11-03 | 2008-06-26 | Abb Ag | Electric switch |
| CN101630611B (en) * | 2008-07-15 | 2012-04-18 | 浙江正泰电器股份有限公司 | Selective protective breaker |
-
2019
- 2019-09-16 CN CN201910871609.9A patent/CN112509890B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210607152U (en) * | 2019-09-16 | 2020-05-22 | 浙江正泰电器股份有限公司 | breaker |
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| CN112509890A (en) | 2021-03-16 |
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